<template>
  <view class="search-box">
    <!-- 使用 uni-ui 提供的搜索组件 -->
    <uni-search-bar @input="input" :radius="100" cancelButton="none"></uni-search-bar>
  </view>
  <!-- 搜索建议列表 -->
  <view class="sugg-list" v-if="searchResults.length !== 0">
    <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
      <view class="goods-name">{{item.goods_name}}</view>
      <uni-icons type="arrowright" size="16"></uni-icons>
    </view>
  </view>
  <!-- 搜索历史 -->
  <view class="history-box" v-else>
    <!-- 标题区域 -->
    <view class="history-title">
      <text>搜索历史</text>
      <uni-icons type="trash" size="17" @click="clearHistory"></uni-icons>
    </view>
    <!-- 列表区域 -->
    <view class="history-list">
      <uni-tag :text="item" v-for="(item, i) in historys" :key="i" @click="gotoGoodsList(item)"></uni-tag>
    </view>
  </view>
</template>

<script setup>
  import { ref, computed } from "vue"
  import {onLoad} from "@dcloudio/uni-app"
  
  let timer = ref(null)
  let kw = ref("")
  let searchResults = ref([])
  let historyList = ref([])
  
  let historys = computed(() => {
    return [...historyList.value].reverse()
  })
  onLoad(() => {
    historyList.value = JSON.parse(uni.getStorageSync('kw') || '[]')
  })
  function input(e) {
    // e.value 是最新的搜索内容
    if(timer.value) clearTimeout(timer.value);
    timer.value = setTimeout(() => {
      kw.value = e
      getSearchList()
    },500)
  }
  
  async function getSearchList() {
    if(kw.value === "") {
      searchResults.value = []
      return;
    }
    const {data} = await uni.$http.get('/api/public/v1/goods/qsearch', { query: kw.value })
    if (data.meta.status !== 200) return uni.$showMsg()
    searchResults.value = data.message;
    
    saveSearchHistory()
  }
  function saveSearchHistory() {
    //保存搜索关键词
    historyList.value.push(kw.value)
    
    historyList.value = Array.from( new Set(historyList.value))
    uni.setStorageSync('kw', JSON.stringify(historyList.value))
    
  }
  function gotoDetail(goods_id) {
      uni.navigateTo({
        // 指定详情页面的 URL 地址，并传递 goods_id 参数
        url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
      })
  }
  //清空搜索历史
  function clearHistory() {
    historyList.value = []
    uni.setStorageSync('kw', '[]')
  }
  
  function gotoGoodsList(kw) {
    uni.navigateTo({
      url: '/subpkg/goods_list/goods_list?query=' + kw
    })
  }
</script>

<style lang="scss">
.uni-searchbar {
  /* #ifndef APP-NVUE */
  display: flex;
  /* #endif */
  flex-direction: row;
  position: relative;
  padding: 16rpx;
  /* 将默认的 #FFFFFF 改为 #C00000 */
  background-color: #c00000;
}
.search-box {
  position: sticky;
  top: 0;
  z-index: 999;
}
.sugg-list {
  padding: 0 5px;

  .sugg-item {
    font-size: 12px;
    padding: 13px 0;
    border-bottom: 1px solid #efefef;
    display: flex;
    align-items: center;
    justify-content: space-between;

    .goods-name {
      // 文字不允许换行（单行文本）
      white-space: nowrap;
      // 溢出部分隐藏
      overflow: hidden;
      // 文本溢出后，使用 ... 代替
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box {
  padding: 0 5px;

  .history-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 40px;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
  }

  .history-list {
    display: flex;
    flex-wrap: wrap;
    padding-top: 5px;
    .uni-tag {
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
